Ask "If you’re saying yes to this, what are you saying no to?"

Every yes is a yes-at-the-expense-of-something — making the trade-off explicit is the most useful thing a coach can do.

Why it works

The instinct to say yes is often driven by the positive pull of the opportunity rather than a clear reckoning of what it costs. Making the implicit trade-off explicit — what does this crowd out? — activates a more complete evaluation. This is related to opportunity-cost thinking and to essentialism: every commitment displaces something else, and if you do not name the displacement, you end up overcommitted by default.

How to do it

1. When someone is deciding whether to take on something, ask: "If you say yes to this, what are you necessarily saying no to — or what becomes harder?"
2. Help them list the specific things: projects, relationships, recovery time, other priorities.
3. Only then return to the yes/no decision.
4. Apply it to yourself in the conversation: "If I add coaching conversations to my calendar, what am I saying no to?"

Evidence

Opportunity cost awareness is associated with better decision quality in behavioral economics research — people who consider opportunity costs make choices better aligned with their actual priorities. Making trade-offs explicit is a cognitive intervention for this. Frederick and colleagues demonstrated that people routinely neglect opportunity costs unless prompted, and that simply making the forgone alternative salient shifts choices — which is exactly what this question does. (mechanistic)

Opportunity cost neglect is documented in consumer and financial decision research; the coaching application — a question that induces explicit trade-off consideration — is an inference from that research base.

Sources

• Frederick et al. (2009), Opportunity cost neglect, Journal of Consumer Research
• Frederick, S., Novemsky, N., Wang, J., Dhar, R., & Nowlis, S. (2009). Opportunity cost neglect. Journal of Consumer Research, 36(4), 553-561.

Common mistake

Asking the trade-off question only when you think they are about to make a bad decision — it is most useful as a routine question for all significant commitments, so it does not signal that you disapprove of the specific choice.